According to Knowledge Article Number 000170918, users or Administrators can set the default dashboard in the lightning home page. (only users can do it in classic).
In reality, ONLY Admins can set the dashboard (it can't be change by the user...unless they clone and maintain their own version of the home page.)

In classic, the user can "customize page" and change the dashboard that is displayed. The remainder of the home page stays under the control of the Admin.
This is critical, because differnet users have different dashboarding needs (which may change over time), and short of maintaing 200 different versions of the home page, there is no way to accomplish this in Lightning.

I do want SF to solve this problem because setting different profiles for only this purpose is not efficiently.
We want to set all the same access rights to employees in sales department, but they do need to see different dashboard on the top page because they belong to different groups.

Thanks for the idea Edward,
I've coded up a solution for this using the Dashboard Web API, saving the selected dashboard as default for each user individually. You can now find it at: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000Ecs3hUAB
Regards,
Martin

Maybe there could be a "Choose Your Own Dashboard" Lightning Component that the Admin would place on the home page. Then, users would be free to select whatever dashboard they'd like to see appear in that designated space.

Salesforce

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